Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5156690 | Building low yield ratio hot-dip galvanized cold rolled steel sheet having improved refractory property | Hirohide Asano, Kazuo Koyama, Takaji Takahashi | 1992-10-20 |
| 4956025 | Process for producing cold-rolled high strength steel sheet having excellent formability and conversion-treatability | Kazuo Koyama, Taketoshi Taira, Kaoru Kawasaki, Atsushi Itami | 1990-09-11 |
| 4801341 | One-sided enamelable hot-rolled steel sheet and process for producing the same | Atsushi Itami, Kazuo Koyama, Takahito Watanabe | 1989-01-31 |
| 4769088 | Process for producing hot-rolled steel sheet having high r value | Atsushi Itami, Kazuo Koyama, Hiroshi Katoh | 1988-09-06 |